I've actually just has this issue come up recently for me as well. I haven't changed a single setting since it's worked last, but now the controllers work in games and the home button will bring up the Steam VR dashboard, but I am unable to point or select anything at all. Makes the VR experience a whole lot more of a hassle.

I've been doing some research, seems like a rare problem, but others have had success by either opting out of the beta for SteamVR if they were in it, or opting in to the 3rd option 'openvr-inputemulator-temporary'.

I'll give this a go next time, but once again, I hop on to have a lil VR fun and I sit around for a few hours troubleshooting. Not blaming Nolo, or anything in particular (except maybe Steam), but it just really deters me from playing VR anymore.